Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cellulose film and method for producing the same

a technology of cellulose film and cellulose film, which is applied in the field of cellulose film and a method for producing the same, can solve the problems of contaminating the equipment for producing the polarizing plate, affecting the production efficiency of cellulose film, so as to reduce the friction coefficient, reduce the production cost of cellulose film, and improve the uv absorption and pliability of cellulose film

Inactive Publication Date: 2011-06-23
HYOSUNG CORP
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]Therefore, it is an object of the present invention to provide a cellulose film and a method for producing the same, which can reduce a bleed-out and an elution of a plasticizer and a UV absorbent in the cellulose film and can also prevent degradations of physical properties of the cellulose film.
[0007]It is other object of the present invention to provide a cellulose film and a method for producing the same, which can improve a slipping property of the cellulose film by reducing a friction coefficient thereof and improve a dimensional stability of the cellulose film by reducing moisture permeability thereof.
[0008]It is another object of the present invention to provide a cellulose film and a method for producing the same, which can prevent formation of a die line on the cellulose film due to scum accumulated on a die lip part.
[0009]It is still another object of the present invention to provide a cellulose film which can be easily peeled off from a supporter, and a method for producing the same.
[0012]Only non-phosphoric acid ester type plasticizer can be used as the plasticizer of the front layer and the rear layer in the present cellulose film, and the inner layer includes a phosphoric acid ester type plasticizer and the UV absorbent. Thus, the bleed-out and the elution of the plasticizer and the UV absorbent can be effectively prevented. In addition, the production cost of the cellulose film decreases and the UV absorbency and pliability of the cellulose film are superior compared with a conventional film using only non-phosphoric acid ester type plasticizer. The hydrophobic fine particles are contained in the rear layer and preferably in the front layer, which decreases the friction coefficient, improve the slipping property, decreases the moisture permeability, and improve the dimensional stability of the cellulose film. Further, the present cellulose film has advantages of suppressing the formation of a die line on the surface thereof and of being easily peeled off from a supporter.

Problems solved by technology

However, the UV absorbent in the cellulose film is liable to be bled out when drying the cellulose film at high temperature, which contaminates the cellulose film.
The UV absorbent is also eluted out during alkali saponification step of the polarizing plate, which contaminates the equipments for producing the polarizing plate.
However, the plasticizer in the cellulose film is also liable to be bled out when drying the cellulose film at high temperature, and is also eluted out during alkali saponification step of the polarizing plate, which contaminates the cellulose film and the equipments for producing the polarizing plate.
However, the non-phosphoric acid ester type plasticizer is expensive and increases the production cost of the cellulose film.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cellulose film and method for producing the same
  • Cellulose film and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

Production and Evaluation of Cellulose Film

[0030]The first casting solution 2, the second casting solution 4 and the third casting solution 6 were prepared. The first casting solution 2 included 18 weight part of triacetyl cellulose (TAC) as a cellulose resin, 81.76 weight part of methylene chloride (MC) as a solvent for dissolving the cellulose resin and 0.2 weight part of aliphatic polyhydric alcohol ester as a non-phosphoric acid ester type plasticizer. The second casting solution 4 included 15.84 weight part of TAC, 81.76 weight part of MC, 1.4 weight part of the phosphoric acid ester type plasticizer (triphenylphosphate) and 0.2 weight part of aliphatic polyhydric alcohol ester as plasticizers, and 0.25 weight parts of benzotriazole compound as a UV absorbent. The third casting solution 6 included 18 weight part of TAC, 81.76 weight part of MC, 0.2 weight part of aliphatic polyhydric alcohol ester as a non-phosphoric acid ester type plasticizer and 0.002 weight part of silica h...

example 2

Production and Evaluation of Cellulose Film

[0031]The first and third casting solutions 2, 6 for producing the front layer 12 and the rear layer 16 of the cellulose film 10 were prepared by 18 weight part of TAC, 81.76 weight part of MC and 0.2 weight part of aliphatic polyhydric alcohol ester as a plasticizer and 0.002 weight part of fine particles. The second casting solution 4 for producing the inner layer 14 of the film 10 was prepared by using 15.84 weight part of TAC, 81.76 weight part of MC, 1.4 weight % of the phosphoric acid ester plasticizer (triphenylphosphate, tricresylphosphate or cresyl-diphenylphosphate) and 0.2 weight part of aliphatic polyhydric alcohol ester as a plasticizer, and 0.25 weight part of benzotriazole compounds as a UV absorbent. By using the die 20 in FIG. 2, each of the first casting solution 2, the second casting solution 4 and the third casting solution 6 was casted into the surface of a metal belt 30 to form a sheet having the thickness of 90 μm and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
total thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

A cellulose film for protecting a polarizing plate of a Liquid Crystal Display Device, and a method for producing the same are disclosed. The cellulose film comprises a front layer which includes a non-phosphoric acid ester type plasticizer; an inner layer which includes a plasticizer and a UV absorbent, and a rear layer which includes a non-phosphoric acid ester type plasticizer and fine particles. Preferably, the front layer further includes fine particles, and the plasticizer in the inner layer includes at least two kinds of plasticizers, and at least one of plasticizer in the inner layer is phosphoric acid ester type plasticizer.

Description

[0001]This application claims the priority benefits of Korean Patent Application No. 10-2009-0130174 filed on Dec. 23, 2009 and Korean Patent Application No. 10-2009-0133810 filed on Dec. 30, 2009. All disclosure of the Korean Patent applications is incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to a cellulose film and a method for producing the same, and more particularly to a cellulose film for protecting a polarizing plate of a Liquid Crystal Display Device (LCD), and a method for producing the same.BACKGROUNDS OF THE INVENTION[0003]Recently, as the demand for portable devices having a LCD increases, the studies for improving the image quality of the LCD and for reducing a production cost have been actively carried out. The LCD is one of the representative flat panel displays that are commercially available. In LCD, the light emitted from a back-light passes through liquid crystal molecules having an anisotropic property and polarizing plates ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B32B5/00B32B23/00B32B5/16B28B11/00B29C48/08
CPCB29C47/0021B29C47/065B29C47/14B29C47/145B29C47/34B29C47/8805Y10T428/25B29K2001/12B32B5/16B32B7/02B32B23/18B32B2457/202Y10T428/259B29K2001/00B29C48/08B29C48/21B29C48/305B29C48/307B29C48/355B29C48/91Y10T428/31971
Inventor HA, SEON-YEONGSHIN, JIK-SOOKIM, YONG-WONCHOI, YU-JIN
Owner HYOSUNG CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com